Surveying target



A. N. KLiTSCHE SURVEYING TARGET Filed April 20, 1925 1 VENTQB. M

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Patented May 14, 1929.

l lTED STATES P i T E N 'l t AMANDUS N. KLITEECHE, (31 CHICAGO, ILLINGIB.

SURVEYING TARGET.

Application filed April 20, 1925.

My invention relates to improvement in the targets used on surveying; rods, in particular in targets used on l1:- lin rods.

'lhe objects 01? my improvement are: first to provide a target that can be moved up and down the rod with case without binding; secend, to provide a screwless chimp tor the target that will hold. it firmly in place with out time spent in turning a screw and third, to provide a clamping device that permits the operator to numipulute the target with one hand with certainty and ease.

ll attain these objects by the mechanism illustrated in the accou'ipanying drawing in l igure 1 is a section view taken just behind, the beck of the target on the lines l--Il. oi l igures 2 end 3 and drawn to full size scale;

liigure 2 is a tii'nnsversc section taken through the center of the target on line 2--2 of lfligures l and 3 and drown to full size scale;

l igure 3 is a side View of the target drawn to full size scale; and

Figure 4 is a tace view of the target on a rod drawn to smell scale and showing the chimp handle in dotted outline.

Similar numerals refer to similar parts throughout the several views.

The target body 1, the holding ribs 2 and the slide bearings are rigidly connected with each other or cast in one piece.

The vernier 4: is firmly screwed to the target body 1. The loose spring 5 can be removed at will and is held in place by the rod (not numbered) which his in between the ribs 2 and by the projecting lip oi one rib.

The spi 5 is sprung in place over one of the members 2 as shown. In normal operation it cannot be removed because the rod is in position between the two members 2. lVhen the target has been removed from the roch this spring may he slipped otl of no member 2 upon which it is normally positioned, being moved in the direction of the other member 2. It is then freed from the overhanginglip of the member 2 upon which it was originally positioned and may be removed.

The release spring 6 is rigidly connected to the slidingnut 7, which in its turn is screwed to the piston member 9 by the screw h. The screw 8 is part oil the piston memher 9.

Serial No. 24,853.

llhroup'h the piston member 9 a set screw 11 passes, thereby connecting the two prongs oi? the clamp handle and at the same time acting as a pivot joint between the piston member 9 and the clamp handle 10.

.iletween the clamp handle 10 and one ol theslide bearings 3 is the washer 12.

ll hen the t2 get is in use us shown in Figure -.-l; the surveying rod tits in between the ribs 2 pressing on the loose spring 5 which in turn presses on the release spring l5 so strongly that the target is held firmly in place.

'lo release the target the rod is held with the left hand and the target with the right hand, the right thumb exerts pressure on the clamp handle it) lfhe handle 10 moves in word,towards the rib 2 turning at the base of the prongs, and, therefore, pressing; hard at this base upon the washer 12. l

At the same time this turning motion of the handle 10 forces the piston member 9 to more outward pulling with it the sliding nut '7 and, therefore the release spring (3 thereby removing the pressure from loose spring 5 and from the rod.

Thus by holding the handle 10 pressed inward towards the rib 2 the target can be moved easily up and down the rod, and the moment the handle 10 is released the s; ring 6 pulls inward towards the spring placing strong pre sure against the rod and holding the target lirmly in the desired position.

The target can also be manipulated in the rezir with the left hand or with the right han d,

When the handle 10 is held against the rib 22 the target moved very eusily and smoothly up and down the rod.

No time is spent in screwing the target in any position. All that is necessary is to let go and the target is tight in place. The target is mimipulated all with one hand, with the greatest ease and without limping or binding.

The wearing per-cs oi the target are the washer 125 and the loose spring 5 and these can easily be replaced.

For these reasons this target is a greet convenience and great improvement on the targets with screw cla 1s and should find an ever widening held of use in surveying.

It will be evident that while I have shown in my drawings an operative device, still many changes might be made in the size,

shape and arrangement of parts Without departing materially from the spirit of my invention and I Wish, therefore, that my drawings be regarded as in a sense diagrammatic. It will be understood that While I,

said yielding member into engagement with said staff, and to thereby lock said target thereon; a releasing handle iulcrumcd upon a fixed portion of said target, a piston member adjustably connected to said spring member; and pivoted connections between said piston member and sai d handle, whereby rocking movements of the latter upon its fulcrum may relieve the pressure of said spring member and unlock the target from the staff.

Signed at Chicago, county of Cook and State of Illinois, this sixteenth day of h Iarch, 1925.

AMANDUS N. K Ll THC/l IE. 

